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Finding the Fourth Proportional to 393,946.60, 590,919.90 and 113,492.20

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Solution

The fourth proportional to 393,946.60, 590,919.90 and 113,492.20 is: 170,238.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,946.60 : 590,919.90 = 113,492.20 : x
  2. Step 2: Convert to fraction form
    393,946.60/590,919.90 = 113,492.20/x
  3. Step 3: Cross multiply
    393,946.60x = 590,919.90 × 113,492.20
  4. Step 4: Simplify right side
    393,946.60x = 67,064,799,474.78
  5. Step 5: Solve for x
    x = 67,064,799,474.78/393,946.60
  6. Step 6: Final answer
    x = 170,238.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.